This is a long shot but I have always wondered about this, so no harm in asking. My grandfather's family left Scotland in the early 1900's. Half went to Canada and half to NY. He went to NY but joined the Canadian Army for WWI. My grandmother moved to Canada also. I have his Canadian military records. They returned to the USA after the war. My parents were born in the USA. I was born in the USA in 1957. We all lived in the USA, along the Canadian border. Did my grandfather become a Canadian citizen when he joined the Canadian Army? Am I eligible for Canadian citizenship by descent? (I would actually wish to get dual citizenship.) Thank you!